 /*
  * $Header: /cvshome/build/org.osgi.service.prefs/src/org/osgi/service/prefs/PreferencesService.java,v 1.10 2006/06/16 16:31:30 hargrave Exp $
  *
  * Copyright (c) OSGi Alliance (2001, 2006). All Rights Reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 package org.osgi.service.prefs;

 /**
  * The Preferences Service.
  *
  * <p>
  * Each bundle using this service has its own set of preference trees: one for
  * system preferences, and one for each user.
  *
  * <p>
  * A <code>PreferencesService</code> object is specific to the bundle which
  * obtained it from the service registry. If a bundle wishes to allow another
  * bundle to access its preferences, it should pass its
  * <code>PreferencesService</code> object to that bundle.
  *
  */
 public interface PreferencesService {
     /**
      * Returns the root system node for the calling bundle.
      *
      * @return The root system node for the calling bundle.
      */
     public Preferences getSystemPreferences();

     /**
      * Returns the root node for the specified user and the calling bundle.
      *
      * @param name The user for which to return the preference root node.
      * @return The root node for the specified user and the calling bundle.
      */
     public Preferences getUserPreferences(String name);

     /**
      * Returns the names of users for which node trees exist.
      *
      * @return The names of users for which node trees exist.
      */
     public String [] getUsers();
 }

